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M38B53M4-059FP Datasheet(PDF) 152 Page - Mitsubishi Electric Semiconductor

Part # M38B53M4-059FP
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  355 Pages
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Manufacturer  MITSUBISHI [Mitsubishi Electric Semiconductor]
Direct Link  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M38B53M4-059FP Datasheet(HTML) 152 Page - Mitsubishi Electric Semiconductor

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2-64
38B5 Group User’s Manual
APPLICATION
2.3 Serial I/O
(2)
Output of serial data (control of peripheral IC)
Outline : Serial communication is performed, connecting port P57 with the CS pin of a peripheral IC.
Figure 2.3.39 shows a connection diagram, and Figure 2.3.40 shows a timing chart.
Fig. 2.3.39 Connection diagram
Specifications : • Use of serial I/O2 in clock synchronous serial I/O
• Synchronous clock frequency : 125 kHz (f(X IN) = 4 MHz is divided by 32)
• Transfer direction : LSB first
• Not use of receive/transmit interrupts of serial I/O2
• Port P57 is connected with the CS pin (“L” active) of the peripheral IC for transmission
control; the output level of port P57 is controlled by software.
Fig. 2.3.40 Timing chart
P57
SCLK21
TxD
38B5 groupPeripheral IC
CS
CLK
DATA
CS
CLK
DATA
CS
CLK
DATA
DO0
DO1
DO2
DO3



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